Table 4. Scavenging effect of high altitude cold desert saxicolous lichens on ABTS and DPPH radicalsa.
| Lichen species | ABTS (IC50/RSa50), mg/ml | DPPH (IC50/RSa50), mg/ml | ||||
| Water | Methanol | n-Hexane | Water | Methanol | n-Hexane | |
| Dermatocarpon vellereum | 6.39±0.10 | 6.24±0.10 | 8.12±0.10*# | 1.59±0.11 | 7.85±0.10* | 1.24±0.10*# |
| Umbilicaria vellea | 3.45±0.11 | 1.92±0.11* | 9.31±0.09*# | 10.33±0.09 | 5.25±0.10* | 1.23±0.10*# |
| Rhizoplaca chrysoleuca | 7.61±0.10 | 3.45±0.09* | 10.67±0.15*# | 2.44±0.11 | 8.48±0.10* | 1.02±0.02*# |
| Rhizoplaca melanophthalma | 5.34±0.11 | 2.99±0.10* | 26.50±0.10*# | 1.65±0.09 | 3.91±0.02* | 1.74±0.09# |
| Pleopsidium flavum | 8.74±0.10 | 3.08±0.11* | 16.47±0.09*# | 2.54±0.10 | 1.09±0.01* | 5.09±0.02*# |
| Xanthoparmelia mexicana | 6.75±0.09 | 3.12±0.10* | 12.52±0.10*# | 1.97±0.08 | 4.58±0.11* | 4.15±0.10*# |
| Acarospora badiofusca | 14.60±0.10 | 2.45±0.09* | 6.55±0.10*# | 5.07±0.04 | 8.21±0.10j* | 2.48±0.10*# |
| Xanthoria elegans | 5.08±0.10 | 7.09±0.10* | 11.78±0.10*# | 7.71±0.11 | 8.10±0.10* | 3.37±0.10*# |
| Lecanora frustulosa | 8.72±0.10 | 5.71±0.11* | 10.49±0.10*# | 7.90±0.09 | 6.61±0.10* | 3.04±0.03*# |
| Lobothallia alphoplaca | 26.47±0.10 | 5.02±0.10* | 9.52±0.13*# | 4.13±0.11 | 2.29±0.01* | 2.87±0.09*# |
| Physconia muscigena | 11.10±0.11 | 3.15±0.08* | 19.11±0.10*# | 62.18±0.12 | 5.59±0.10* | 8.62±0.10*# |
| Melanelia disjuncta | 8.45±0.08 | 7.58±0.08* | 21.67±0.10*# | 67.44±0.10 | 8.40±0.10* | 3.65±0.10*# |
| Xanthoparmelia stenophylla | 4.42±0.10 | 1.88±0.09* | 7.99±0.09*# | 7.11±0.09 | 5.38±0.11* | 5.08±0.02*# |
| Peccania coralloides | 15.91±0.10 | 4.87±0.10* | 14.28±0.09*# | 5.95±0.05 | 10.25±0.09* | 8.53±0.12*# |
| Quercetin | 0.33±0.03$ | 0.08±0.02$ | ||||
| Ascorbic acid | 0.18±0.01$ | 0.05±0.01$ | ||||
a
Mean ±SD of three replicates
p<0.05: *compared with water extract; #compared with methanol extract; $compared with all lichen extracts.